Question

The van der Waals parameters for gases W, X, Y and Z are
`{:("Gas",a("atm"L^(2)mol^(-2)),b(L"mol"^(-1))),(W," "4.0," "0.027),(X," "8.0," "0.030),(Y," "6.0," "0.032),(Z," "12.0," "0.027):}`
Which one of these gases has the highest critical temperature?
A. W
B. X
C. Y
D. Z

Answer 1

Correct Answer - D
For Z gas of given gases, critical temperature is highest
`T_(c )=(8a)/(27Rb)implies T _(c ) = (8xx12)/(27xx.0821 xx .027)=1603.98K`